Year: 2023
Type: dissertation
Abstract: This thesis describes the results of research on improving the properties of cobalt (Co)-free nickel (Ni)based layered positive electrode materials for lithium-ion batteries (LIBs).Currently available Ni-based layered positive electrode materials for LIBs contain a certain amount of Co, but from the viewpoint of material cost reduction and resource procurement, Co-less or Co-free electrode materials with their Co content as low as possible are desired.Therefore, with the aim of developing high-performance and lowcost Ni-based layered positive electrode materials, the effect of Co on the electrochemical properties of Ni-rich layered electrode materials with Ni content of more than 80 at% was investigated and novel Cofree materials were synthesized and characterized.Chapter 1 describes an overview of Ni-based layered positive electrode materials, characterization methods, background of Co-free materials in Ni-rich layered positive electrode materials and their issues in previous studies, as well as the purpose and significance of this study.Chapter 2 describes the details of the synthesis and characterization methods of the Co-free Ni-rich layered materials in this study.Chapter 3 describes the effect of Co substitution on the electrochemical properties of the Ni-rich layered materials.Co-substituted lithium nickel oxide (NC: LiNixCo1-xO2), in which a part of Ni is substituted by Co, was synthesized and its charge-discharge behavior under various electrochemical evaluation
Author: Haruki Kaneda
Language: Japanese
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7220132811